Aperture sight



33-251.. OR la476980 SR T. P. EUS'EEGE APERTURE SIGHT J Filed Oct. 9. 1922 l N lif in.

Patented Dec. 11, 1923.

UNITED STATES PATENT OFFICE.

APERTURE SIGHT.

Application filed October 9, 1922. Serial No. 593,478.

To all whom it may concern:

Be it known that I, THOMAS PETER Eus- TEGE, a subject of the King of Great Britain and Ireland, residing in Wellington, New Zealand, have invented a new and useful Improvement in Aperture Sights; and I do hereby declare the following to be a full, clear, and exact description of the same.

This invention relates to aperture sights.

The object of the invention is to provide an aperture sight the opening of which is adjustable without the object being lost to view through such aperture by the operator.

According to this invention means are provided whereby the diameter of the aperture may be adjusted without closing the aperture or altering the formation of the aperture during adjustment.

In a preferred form of the invention rollers are employed each having a groove around its circumference, such groove being semi-circular and tapered and such that when the two rollers mesh together the grooves will oppose each other and form a circular opening between the rollers. As the rollers are rotated the opening will increase or diminish in diameter according to the direction the rollers are rotated. The rollers are rotatably mounted in a suitable housing having a desired eye piece integral with or detachable therefrom. The rollers may be made to rotate together by means of V joints or teeth upon the edges of the rollers. A milled head will be attached to one of the roller spindles in order that the rollers may be rotated as desired.

The invention will be described with the aid of the accompanying drawings, where- Figure 1, is a plan.

Figure 2, is a side elevation.

Figure 3, is a front elevation.

Figure 4, is a cross sectional elevation, and

Figure 5, is a sectional plan of the sight.

Figure 6, is a longitudinal section.

Figure 7, is a sectional plan, and

Figure 8, is a plan of the rifle sight drawn to a larger scale than Figures 1 to 5.

Figure 9, is a plan of a roller.

Figure 10, is an end view of a frame for the rollers.

Figure 11, is a section of a frame.

Figure 12, is a side elevation of such frame showmg the rollers in position thereon.

Figure 13, is a view of the rollers.

Referring to the drawings the device consists of rollers 1 and 2 rotatably mounted in a frame 3 and this frame is adapted to be dropped into a housing 4 containing an eyepiece 5 and a threaded nipple 6 to enter the bar 7 of a sight or the like. The rollers 1 and 2 have grooves 8 and 9 respectively. The groove in each roller may extend round the rollers as in Figure 5 or as shown in Figure 7. The grooves are semi-circular at all points upon the circumference of the rollers and pass from a maximum diameter at 10 to a minimum diameter at 11. In the position of the rollers in Figures 7 and 12 the maximum portions 10 of the grooves are opposite each other and the maximum opening of the aperture will be obtained. When the rollers are rotated to the position shown in Figures 4 and 13 the minimum portions 11 are opposite each other and the minimum opening will be obtained. The rollers are placed in the frame so that corresponding parts of the groove will register together and are made to rotate in opposite directions at the same speed and for this purpose the rollers are provided with flutes 12 around their circumference (see Figures 6 and 9) and such rollers will mesh to gether. As the rollers are rotated the grooves 8 and 9 will coincide one with the other and the aperture will therefore, increase or diminish according to the direction in which the rollers are rotated. When desired the rollers may be made to rotate by means of teeth 13 (see Figure 12) formed upon their circumference, or by means of toothed Wheels fixed upon the rollers. The rollers are inserted in the frame 3, the spindles 14 of such rollers entering holes 15 in the ends of the frame. The frame is held in position within the housing by means of a plate 16 recessed into the housing as shown in Figure '7 and secured by means of screws 17 passing through holes in the ends of the plate into lugs 18 (see Figure 3). The spindle of the roller 1 is extended and passes through the plate 16 and has a milled head 19 attached thereto in order to rotate the roller. Openings 20 and 21, formed radially from a point E corresponding to the position of the eye and passing through the housing opposite the grooves 8 and 9 enable the opening formed by the grooves to be seen through the eye piece. The milled head has a pointer 22 to register with num bers as shown in Figure 8, in order to indicate the position of the rollers, while the pointer is adapted to engage against stops 23 in order to limit the rotation of the rollers.

Pins 24 are provided in the frame 3 to engage grooves 25 in the roller 2 (see Figure 12) in order to retain the rollers close together, the holes 15 for the roller being in such case slightly elongated. In order toprevent end movement of the rollers screws 26 may be inserted into the spindles 1 L so that the ends of the rollers can be adjusted to bear without end play against the frame. The frame in Figure 12 is shown with an end piece 27 screwed to the frame by screws 28, the rollers being first inserted and the end piece then placed in position.

In Figure 10 an alternate form of frame is shown and is made in one piece having slots 28 in the end members of the frame for the insertion of the rollers and the rollers are then brought together by means of the threaded pins 29.

Instead of the grooves being semi-circular they may be made for certain purposes of any desired contour, for example V shaped, in which case the resulting aperture would be diamond shaped.

WVhat I claim is 1. An aperture sight comprising a housing, members rotatably mounted therein with their surfaces contacting and provided on their contacting surfaces with tapered grooves in register with each other so as to form a sight-aperture adapted to vary in size as the said members are rotated.

2. An aperture sight comprising a hous ing, rollers mounted therein with their surfaces contacting and having tapered grooves on said surfaces in register with each other so as to form a sight-aperture varying in size as the said rollers are rotated, and means for rotating the said rollers.

3. An aperture sight comprising a housing, rollers mounted therein with their surfaces contacting, the latter containing tapered semi-circular grooves having their contacting edges coincident so as to form a sight-aperture adapted to vary in size as the said rollers are rotated, and means for rotating the said rollers.

at. An aperture sight as specified in claim 3, comprising also an eye-piece on said houslng.

5. An aperture sight comprising a housing, a frame contained in the said housing, rollers rotatably mounted in the said frame with their surfaces contacting, the latter containing tapered grooves in register with each other so as to form a sight-aperture varying in size as the said rollers are rotated, and means for rotating the said rollers.

6. An aperture sight as specified in claim 5, comprising also an eyepiece on said housing.

7. An aperture sight comprising a housing formed with an eye-piece, rollers mounted in said housing with their surfaces contacting, the latter containing tapered grooves in register with each other so as to form a sightaperture adapted to vary in size as the said rollers are rotated, means for rotating the said rollers, and means for bringing the circumference of the said rollers into close mutual contact.

8. An aperture sight as specified in claim 7, comprising also means for preventing endwise movement of the said rollers.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS PETER 'EUSTEGE.

WVitnesses:

SYDNEY H. HIGGS, E. P. ODoNNnLL. 

